Answer:
1) Which line from the poem best helps the reader to understand the meaning of "ensign"? C) "That banner in the sky"
2) Based on this stanza from the poem, what is another word for an "ensign"? B) flag
3) What does the image of ‘every threadbare sail’ suggest? B) The ship has endured much at sea.
Step-by-step explanation:
From the context clues present in the poem, we can easily understand that an ensign is a flag or a banner. As a matter of fact, an ensign can be defined as a flag or a standard, especially a naval or military one, that indicates nationality. Therefore, the best answers for numbers 1 and 2 are C and B, respectively.
As for number 3, I believe letter B to be a better option than letter A. Of course a storm could have caused the sails to tear. But from the rest of the poem we can see that this ship has gone through a lot. It has been used in battles, it has defeated enemies, it has sailed across the ocean like a "meteor". We can assume that this ship can no longer do those things after many years being in use. The threadbare sail suggests that the ship has endured much and has now reached the end of its "life".